x86, cpu: Add AMD core boosting feature flag to /proc/cpuinfo

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By semi-popular demand, this adds the Core Performance Boost feature
flag to /proc/cpuinfo. Possible use case for this is userspace tools
like cpufreq-aperf, for example, so that they don't have to jump through
hoops of accessing "/dev/cpu/%d/cpuid" in order to check for CPB hw
support, or call cpuid from userspace.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <1270065406-1814-2-git-send-email-bp@amd64.org>
Reviewed-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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Borislav Petkov 2010-03-31 21:56:41 +02:00 • committed by H. Peter Anvin

parent 2eaa9cfdf3

commit 5958f1d5d7

2 changed files with 4 additions and 2 deletions

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1

arch/x86/include/asm/cpufeature.h

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5

arch/x86/kernel/cpu/addon_cpuid_features.c

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